TS EN ISO 3766

TS EN ISO 3766 is a drawing standard for the simplified representation and identification of reinforcement in construction drawings for reinforced and prestressed concrete. Its purpose is to make reinforcement information clear, consistent and quick to read when detailed bar arrangements need to be shown in a simplified form on project documents.

How reinforcement is handled in structural drawings

Reinforced concrete uses steel reinforcement to complement the compressive strength of concrete, while prestressed concrete relies on steel that has been tensioned in advance to improve structural performance and service behaviour. The focus of this standard is not the structural design of the reinforcement itself, but the simplified graphical presentation used on drawings. That distinction matters because construction documents must communicate layout and identification clearly without overloading every view with full fabrication detail.

Where this standard is useful

• Simplified presentation of reinforcement on construction drawings
• Identification of reinforcement in reinforced concrete elements
• Representation of reinforcement in prestressed concrete elements
• Improved readability and consistency across drawing sets

In general technical terms, the standard supports a common visual language for reinforcement information within the broader practice of technical drafting. It helps separate high-detail fabrication information from general arrangement information, which is important in multidisciplinary project documentation. The result is reinforcement drawings that are easier to interpret, easier to coordinate and more consistent across different sheets and teams.